51270287 has 4 divisors (see below), whose sum is σ = 51372720. Its totient is φ = 51167856.

The previous prime is 51270277. The next prime is 51270293. The reversal of 51270287 is 78207215.

51270287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51270287 - 2⁸ = 51270031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51270217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50462 + ... + 51467.

It is an arithmetic number, because the mean of its divisors is an integer number (12843180).

Almost surely, 2^51270287 is an apocalyptic number.

51270287 is a deficient number, since it is larger than the sum of its proper divisors (102433).

51270287 is a wasteful number, since it uses less digits than its factorization.

51270287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102432.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 51270287 is about 7160.3272969886. The cubic root of 51270287 is about 371.4969474077.

The spelling of 51270287 in words is "fifty-one million, two hundred seventy thousand, two hundred eighty-seven".